Addressing Climate Change Driven Health Challenges in Africa

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Addressing Climate Change Driven Health Challenges in Africa Addressing climate change driven health challenges in Africa Ednah N Ototo, Parasitologist, Climate Change and Health Kenyatta University, Kenya Kenya Medical Research Institute The impact of climate change in Africa with respect to public health and disease prevalence How is the continent coping with this impact? Outline Key Research priorities and the emerging stories Health is sensitive to Climate Change. Climate change and climate variability will alter temperature, air movements and precipitation important consequences for human health, the environment and on Effects of the economies of African countries, likely to impede development. African countries are more vulnerable to climatic change in the world Climate poverty, weak institutions and armed conflict. limiting the capacity of African countries to deal with the additional Change on health challenges posed by climate change. (Huge cost of Adaptation). Public Health The type and magnitude of the health impacts of Climate change geographic and micro-climate differences, socio-economic in Africa conditions, the quality of existing health infrastructure, communication capacity, and underlying epidemiology. Good news- Africa has already begun to address climate and health issues. It is important to determine what we can do differently to Adapt 05.06.2018 4 The severity of droughts is increasing throughout the African continent resulting in hunger, famines, malnutrition and under nutrition. Droughts are affecting both livestock and food production in many regions in the continent, and this is expected to worsen as the continent becomes hotter and drier. Water conservation and irrigation for drought management Malnutrition (Leads to other problems of habitats for vectors) However these efforts have not adequately addressed the current food production and future demands. Droughts have been known to affect mental health due to anxiety, depression and suicide, particularly in farming and pastoralist communities. Vector Borne infections Evolution of epidemics Anomalous Accelerated Transmission parasite amplification temperatures development In mosquitoes Heats permanent breeding habitats Accelerated Rainfall Mosquito mosquito expands population development breeding amplification habitats 1 2 3 4 Months Over 90% of the global malaria burden occurs in Africa and is associated with considerable mortality and morbidity Climate scenario indicates that the disease geographic range may contract in some areas and expand in others especially in the African Highlands Prior to the ongoing malaria control efforts severe epidemics occurred in the East African highlands during El Nino years and resulting in 100% increase in the number of hospital admissions Due to global efforts to control malaria, malaria prevalence has dropped by 40% between 2000 and 2015 (WHO, roll back malaria, global funds and Malaria presidential fund by the US government) An increase in temperature and Precipitation results to an increase in vector abundance and an increase in the rate of malaria transmission Future projections show that due to future expected temperature and rainfall increases, more malaria cases will be reported. Control measures such as LLINS, IRS, early diagnosis and treatment are effective in malaria control Development of Effective vaccines is underway Early warning systems, Bio larvicides are other strategies to control malaria 05.06.2018 11 Rift Valley fever (RVF) is a viral zoonosis that primarily affects animals but can also infect humans. The majority of human infections result from contact with the blood or organs of infected animals. Human infections have also resulted from the bites of infected Rift valley mosquitoes. To date, no human-to-human transmission of RVF virus has been Fever documented. The incubation period (the interval from infection to onset of symptoms) for RVF varies from 2 to 6 days. Outbreaks of RVF in animals can be prevented by a sustained programme of animal vaccination. 2016, Republic of Niger: As of 11 October 2016, Ministry of Health reported 105 suspected cases including 28 deaths in humans 2012 Republic of Mauritania: The Ministry of Health in Mauritania declared an outbreak of RVF on 4 October 2012. From 16 September 2012 (the date of onset of the index case) to 13 November 2012, a total of 36 cases, including 18 deaths were reported from 6 regions. 2010, Republic of South Africa: From February to July 2010, the Government of South Africa reported 237 confirmed cases of RVF in humans, including 26 deaths from 9 provinces. 2008–2009, Madagascar: From December 2008 to May 2009, the Ministry of Outbreaks of Health, Madagascar reported 236 suspected cases including 7 deaths. RVF in Africa 2008, Madagascar: The Ministry of Health, Madagascar reported an outbreak of RVF on 17 April 2008. From January to June 2008, a total of 476 suspected cases of since 2000 RVF including 19 deaths were reported from 4 provinces. 2007, Sudan: The Federal Ministry of Health, Sudan, reported an outbreak of RVF on 28 October 2008. A total of 738 cases, including 230 deaths, were reported in Sudan between November 2007 and January 2008. 2006, Kenya, Somalia and Tanzania: From 30 November 2006 to 12 March 2007, a total of 684 cases including 234 deaths from RVF was reported in Kenya. From 19 December 2006 to 20 February 2007, a total of 114 cases including 51 deaths was reported in Somalia. From 13 January to 3rd May 2007, a total of 264 cases including 109 deaths was reported in Tanzania. 2003, Egypt: In 2003 there were 148 cases including 27 deaths of RVF reported by the Ministry of Health of Egypt. Arboviruses transmitted by the Aedes mosquito Occur both during drought and rainy seasons Chikungunya, Mosquitoes breed in discarded containers and water drums The Chikungunya and Dengue viruses are sensitive to Dengue, temperatures, short incubation period Yellow fever Yellow Fever has a vaccine and it is also water and temperature dependent. Transmission of Yellow fever can be maintained by the Animal sylvatic cycles (the wild Type). Meningitis The Meningitis belt consists part of or all of Gambia, Senegal, Guinea-Bissau, Guinea, Mali, Burkina Faso, Ghana, Niger, Nigeria, Cameroon, Chad, Central African Republic, Sudan, South Sudan, Uganda, Kenya, Ethiopia, Eritrea. The largest epidemic recorded to date occurred in 1996–1997, causing over 250,000 cases and 25,000 deaths. The region continues to experience outbreaks of various scales, with 2009 being particularly severe in Nigeria and Niger Future temperature increases due to climate change have the potential to significantly increase meningitis cases The major control strategy has been based on the development of effective and affordable vaccine Pathways for Weather to Affect Health: Example = Diarrheal Disease Distal Causes Proximal Causes Infection Hazards Health Outcome Temperature Survival/ replication Consumption of of pathogens in the Humidity contaminated water Incidence of environment Precipitation mortality and morbidity Living conditions Contamination of Consumption of water sources contaminated food attributable (water supply and to diarrhea sanitation) Contamination of Contact with Food sources and food sources infected persons hygiene practices Vulnerability Rate of person (e.g. age and to person contact nutrition) Source: WHO Dependent on level of sanitation and availability and use of improved drinking water (increased sea levels) Dose dependent During droughts, infected people do not wash their hands hence contaminating few sources of water Cholera Increase in temp causes algae bloom that increases zooplanktons which are the natural reservoirs of the vibrio cholera Extreme weather conditions such as El Nino break down latrines and contaminate water sources Most affected are countries around the great lakes, poor and lacking in sanitation Control and prevention (New Strategies, For some diseases eg malaria sustained and increased control) Development and use of Vaccines How the Improved Health systems Improved primary health care and prevention continent is Collaboration with international partners (Research, prevention coping with and treatment of infectious diseases) Research and development- new drugs, epidemiological research, this Climate surveillance Change Improved health information systems impact Early warning systems for all the diseases – eg RVF using NDVI and sea surface temperatures Dissemination of Climate information for Early warning Development of Climate Change policies Investigate how climate change modifies human security and the risk of conflict through changes in resource scarcity, likelihood of migration, capacity of the government to respond and frequency and intensity of extreme weather events Investigations on the costs of the projected health impacts of climate change; effectiveness of adaptation; and the limiting forces, major drivers and costs of Uncertainties, adaptation. Long-term health impacts of extreme climate events Key Research Development of proper longitudinal Health data collection and data storage systems. Development of methods to quantify the current impacts of climate and Priorities and weather on a range of health outcomes, particularly in low- and middle- income countries. Emerging Assessing climate impacts on health of vulnerable groups inclusive of Gender issues Stories Identifying vulnerabilities of displaced populations Addressing loss of access to critical services including medical care and education for marginalized groups ThankYou Thank You For listening 21.
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